@charset "utf-8";
.title {
    text-align: center;
    margin-bottom: 20px;
}
.bk{
    width: 320px;
}
#cont{
    border:2px solid green;
    width: 400px;
    height: 50px;
    text-align: center;
    line-height: 50px;
    font-size: 22px;
    font-family: '楷体';
    color:green;
}